Improved ORR Performance of Precious Metal‐Free Fe Single‐Atom Catalysts by Heteroatom Doping
Abstract The development of platinum group metal (PGM)‐free catalysts is essential to advance the wide application of fuel cells. Single‐atom Fe─N─C catalysts are one type of promising PGM‐free catalysts that can replace the expensive Pt/C catalyst for the electrocatalytic oxygen reduction reaction....
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2025-07-01
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| Series: | Advanced Materials Interfaces |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/admi.202500253 |
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| Summary: | Abstract The development of platinum group metal (PGM)‐free catalysts is essential to advance the wide application of fuel cells. Single‐atom Fe─N─C catalysts are one type of promising PGM‐free catalysts that can replace the expensive Pt/C catalyst for the electrocatalytic oxygen reduction reaction. However, Fe─N─C catalysts still suffer from poor stability due to the inevitable Fenton reaction. In this work, a doping strategy is demonstrated to alter the electronic structure around the catalytic sites and significantly improve their catalytic activity. In particular, the phosphorous‐doped Fe─N─C catalyst (P─Fe─N─C) achieves a half‐wave potential of 0.885 V versus RHE in 0.1 m KOH and demonstrates excellent stability, with only a 7 mV decay in the half‐wave potential after 10 000 cyclic voltammetry cycles, superior to that of boron‐doped one (B─Fe─N─C). Density functional theory (DFT) calculations further confirm that heteroatom doping favors the ORR process, highlighting the potential of this catalyst for advanced energy applications. |
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| ISSN: | 2196-7350 |